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American HETF-40 1**

American HETF-40 1** is in the DOE listing as of Oct 19, 2026.

  • Electric storage water heater
  • 1 listed model

ENERGY STAR certification does not cover this type of water heater.

Its figures are also listed under A. O. Smith HETF-40 1**.

Storage volume
36gallons
UEF
0.93Uniform energy factor
First-hour rating
63gallonsHot water in the first hour
See it among every electric storage model

Advertised and certified figures

American HETF-40 1**: advertised and certified
American HETF-40 1**: advertised and certified Size: advertised 40 gal, certified 36 gal (advertised nominal size, certified storage volume). Size: advertised 36 gal, certified 36 gal (certified storage volume). UEF: advertised 0.93, certified 0.93. First-hour rating: advertised 55 gal, certified 63 gal. Size · advertised nominal size, certified storage volume Advertised 40 gal Certified 36 gal Size · certified storage volume Advertised 36 gal Certified 36 gal UEF Advertised 0.93 Certified 0.93 First-hour rating Advertised 55 gal Certified 63 gal
FigureAdvertisedCertifiedAdvertiserRead
Size 40 gal, nominal size 36 gal storage volume American Read Oct 5, 2026
Size 36 gal 36 gal storage volume American Read Oct 5, 2026
UEF 0.93 0.93 American Read Oct 5, 2026
First-hour rating 55 gal 63 gal American Read Oct 5, 2026

Certified figures by listed model

Model numberStorage volume (gal)UEFFirst-hour rating (gal)Recovery efficiencyDraw pattern
EE6U-40H 1**360.936398%Medium

UEF is the uniform energy factor. A dash means the model has no such figure.

It holds 36 gallons in the test, 4 gallons less than its 40-gallon sold size. Over one hour from a full tank, it gave 63 gallons in the test (its first-hour rating). Reheating lets it give 27 gallons beyond the 36 gallons in its tank. Among 477 electric storage models, 99 have a higher first-hour rating. The median electric storage model gives 55 gallons in its first hour.

In tests, 93% of the energy it uses ends up as hot water (UEF 0.93). In the test, daily hot water use was set to medium (its draw pattern). Of 297 electric storage models with the same draw pattern, 20 have a higher UEF. For its type and draw pattern, the median UEF is 0.92. Of the energy spent to reheat water, 98% goes into it (its recovery efficiency).

Its test figures match those of 4 other basic models. Each of them is listed under a different brand. For the full group, see the A. O. Smith HETF-40 1**.

Also listed as

They carry every figure in the table above.

Updated Oct 19, 2026 · Methodology

Not covered

  • Changes to an advertised figure after the date beside it.